Mold for artificial teeth.



PATENTED MAR. 28, 1905. G. H. WHITELEY. MOLD FOR ARTIFICIAL TEETH.

APPLICATION FILED OOT. 26.1904.

uvawtoz UNITED STATES Patented March 28, 1905.

PATENT OFFICE.

GEORGE H. W HITELEY, OF YORK, PENNSYLVANIA, ASSIGNOR TO DEN- TISTSSUPPLY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

MOLD FOR ARTIFICIAL TEETH.

SPECIFICATION forming part of Letters Patent No. 785,993, dated March28, 1905.

i Application filed October 26,1904. Seria1No.230,107.

To all whom, it may concern:

Be it known that I, GEORGE H. VVHITELEY, a citizen of the United States,residing at York, in the county of York and State of Pennsylvania, haveinvented new and useful Improvements in Molds for Artificial Teeth, ofwhich the following is a specification.

This invention relates to the manufacture of artificial teeth, andparticularlyto the devices employed for molding the teeth.

The present invention is designed particularly as an improvement uponthe type of mold described and claimed in Patent No. 613,711, grantedNovember 8, 1898, to Page and Bloom. In said patent one of the membersof the mold is fitted with one or more projecting posts employed totemporarily support a detachable piece of metal, such as platitinum,which piece of metal is to form the anchor for the pin of German silveror other relatively inexpensive metal which will be soldered thereto. Insaid patent the post is of metal and is permanently supported in one ofthe members of the mold, so that when the tooth has been molded and themembers of the mold separated and the molded tooth removed from theprojecting post or posts a recess or cavity is left in the material ofthe tooth, the anchor being at the bottom of said recess or cavity.

The object of this invention is to dispense with the metallic post orposts carried by one of the members or sections of the mold and tosubstitute therefor an inexpensive temporary support for theanchoring-piece of metal, which temporary support or supports will staywith the tooth when it is removed from the mold, but will be destroyedby the heat employed for baking or burning the tooth.

To these ends the invention consists in the construction substantiallyas hereinafter described and claimed.

Of the accompanying drawings, Figure 1 represents a sectional viewthrough a mold adapted to be employed in carrying out my invention. Fig.2 represents aface view of one of the sections or members of the moldand will be referred to as the bottom part of the mold. Fig. 3 is anenlarged representation of a wooden pin or post and a platinum anchorwhich may be employed.

Similar reference characters indicate similar parts in each of thefigures.

The bottom and top portions of the mold are represented, respectively,at 10 and 11, said two portions or members having their coacting facesformed to mold the material of the tooth in the desired form. I havesimply selected one form of tooth-forming cavity to illustrate myinvention. Of course the moldsections may be formed to simultaneouslymold a number of teeth instead of one, as represented in Fig. 2. Thenumber of teeth that may be molded at one time has nothing to do with myinvention.

The bottom section of the mold is formedwith one or more recesses toloosely receive the post or posts 12, which is shown in Fig. 1 astemporarily supporting an anchor 15. For convenience I will refer to butone post. Said post is formed of a material which will be destroyed bythe temperature of the oven in which the molded tooth is baked. F orthis purpose I prefer wood, although other destructible material mightbe employed, such as Wax or a paper-roll. If the roll were employed, itsouter or projecting end would preferably be closed, so as to prevent theentrance of tooth material into said roll. Preferably the post 12 willbe formed with a slight shoulder, as indicated in Fig. 3, to locate theposition of the anchor 13. In Fig. 3 I have represented the anchor as ofa tubular corrugated type shown and claimed in the application of S. S.Bloom, Serial No. 185.5417; but it is to be understood that my inventionis applicable for supporting any kind of detachable piece of metal thatis to be employed in the tooth and is to form the head to which theinner end of the pin that connects the tooth to the vulcanite plate maybe soldered.

Owing to the fact that the post is of a nonmetallic material, such asdescribed, there is some elasticity which will reduce the liability ofdifficulty in separating the molded teeth from the mold. When rigidmetallic posts are employed, the act of separating the molded butunbaked tooth from the mold is liable to post adapted to be destroyed byhigh temperature, said post being removably connected with the moldwhereby it will be carried by 5 the tooth when the latter is removedfrom the mold and then destroyed during the baking of the tooth Intestimony whereof I affix mysignatnre in presence of two subscribingwitnesses.

GEORGE H. WVHITELEY. Witnesses:

JAS. H. SoHoLL, N. R. Onoss.

